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Finding the Fourth Proportional to 936.24, 1,288.92 and 874.18

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Solution

The fourth proportional to 936.24, 1,288.92 and 874.18 is: 1,203.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    936.24 : 1,288.92 = 874.18 : x
  2. Step 2: Convert to fraction form
    936.24/1,288.92 = 874.18/x
  3. Step 3: Cross multiply
    936.24x = 1,288.92 × 874.18
  4. Step 4: Simplify right side
    936.24x = 1,126,748.09
  5. Step 5: Solve for x
    x = 1,126,748.09/936.24
  6. Step 6: Final answer
    x = 1,203.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.